[Brock University] BIOL 1P91 Midterm
UPDATED Exam Questions and
CORRECT Answers
The smallest functional unit in living organisms - CORRECT ANSWER- Atoms
The three subatomic particles - CORRECT ANSWER- protons, neutrons, electrons
Where the neutrons and protons are found - CORRECT ANSWER- The ...
The smallest functional unit in living organisms - CORRECT ANSWER- Atoms
The three subatomic particles - CORRECT ANSWER- protons, neutrons, electrons
Where the neutrons and protons are found - CORRECT ANSWER- The atomic nucleus
What was Rutherford's experiment? - CORRECT ANSWER- A fine beam of positively
charged alpha particles (helium nuclei) was aimed at an extremely thin sheet of gold. A zinc
sulphide screen was used to detect any alpha particles that passed through or bounced off.
What shape are "s" orbitals? - CORRECT ANSWER- Spherical
What shape are "p" orbitals? - CORRECT ANSWER- Propeller or dumbbell shaped.
How many electrons can an orbital hold? - CORRECT ANSWER- 2 electrons
What happens when the outer orbital isn't full? - CORRECT ANSWER- The tend to share
What are valence electrons? - CORRECT ANSWER- Electrons in the outermost shell
What is the atomic number? - CORRECT ANSWER- The number of protons in the atom
What unit is atomic mass measure in? - CORRECT ANSWER- Daltons
What is Avagadro's number? - CORRECT ANSWER- The amount of atoms in 1 mole
(6.022e23)
, What is different between isotopes? - CORRECT ANSWER- The number of neutrons
What are radioisotopes? - CORRECT ANSWER- Unstable isotopes
What is a major use of radioisotopes? - CORRECT ANSWER- Modern medicine
What are the four main elements of life? - CORRECT ANSWER- Oxygen, carbon, hydrogen,
nitrogen
How much of a living organism is made up of the four main elements? - CORRECT
ANSWER- 95%
What is a molecule? - CORRECT ANSWER- Two or more atoms bonded together
How do covalent bonds join atoms? - CORRECT ANSWER- By sharing electrons
What is electronegativity? - CORRECT ANSWER- The measure of it ability to attract
electrons in a bond
What is a polar covalent bond? - CORRECT ANSWER- A covalent bond in which electrons
are not shared equally
What is another word for a polar molecule? - CORRECT ANSWER- Dipole
What is a polar molecule? - CORRECT ANSWER- Molecules with a significant number of
polar bonds
What is an ionic bond? - CORRECT ANSWER- A chemical bond that's formed when an
atom transfers and electron to another atom
What is a cation? - CORRECT ANSWER- A positively charged ion
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